center-of-mass energy 中文意思是什麼
center-of-mass energy
解釋
質心系能量-
Since rhic has run at a center - of - mass energy snn = 130 gev, and star collaboration analysed antiproton to proton ratio in mid - rapidity region using the first batch of data
去年， rhic上的star實驗組利用質心系能量130agev的an an對撞產生的首批數據，對中心快度區的反質子質子比進行了研究。 -
Then the dependences of the cross section on the center - of - mass energy of xcj and baryon are given in the work
離解的截面，給出了截面對x 。和重子的質心系能量的依賴關系。 -
Particle ratios embody the chemical equilibrium driven by inelastic interaction during rapid expansion when the temperature decreases in the colliding system, the measured hadron ratios provide the chemical composition of the fireball at the chemical freeze - out point and access the baryon transporter stopping ) for the initial conditions at early stage of the collisions. in this paper, we study the anti - proton to proton ratio from ig7au + 197 au collisions, analyzing p / p ratio as functions of rapidity, transverse momentum and centrality at ^ / saw = 200gev and the dependence on the center of mass energy of p / p ratio, compared with the experimental results. it shows that the p / p ratio has n ' t obvious dependence on rapidity for mid - rapidity, but shows a slight increase trend with pt increasing in the range of pt < 1gev / c for mini - bias or central collisions, and rqmd shows a more remarkable correlation between p / p ratio and centrality than experiments do at snn = 200gev
研究表明：對廠在中心快度區沒有明顯的快度依賴性，在越靠近邊緣快度區， p p呈下降趨勢；在對心碰撞或者最小無偏事件中， p p在低橫動量區域隨著橫動量的升高而增大； p隨著碰撞對心度的比實驗結果表現出稍強的隨對心度增大而減小的趨勢，尤其是有再散射ujrqmd模型；在中心快度區， p p隨著碰撞的質心能量的提高而快速的增大，與實驗結果一致；在低能，有末態粒子再散射的d較好的預言了的：但是在mc能量下，有末態粒子在散射的d所預言的p p值比實驗值要小。 -
After the ball leaves, the racquet mass center ( balance point ) moves at a slower speed, and this means a loss of its kinetic energy ( kinetic energy = 1 / 2 mass times velocity squared )
球離開之後，球拍開始減速，球拍減速的過程就是能量釋放的過程，釋放能量的值等於? （球拍）質量乘以速度的平方。 -
The orientation state of the molecule can be described by angular momentum eigenstate of the molecule rotating around its long axis ; the state of the molecule center - of - mass can be described by energy eigenstate of the particle in the harmonic well potential
）和分子質心位矢（ ? ） 。分子取向態可用分子繞長軸自轉角動量本徵態描述；分子質心態可用質點在諧振子勢阱中的能量本徵態來描述。
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